Manufacturing method for heat transfer pipe support structure of nuclear steam generator

ABSTRACT

Heat transfer tube support structure manufacturing method of a nuclear power steam generator, a roll form and the first planarization step the base material by unscrewing from the roll flattening by a rolling device, the length is set based on the base material over the first flattening step in a rectangular shape and a cutting step of cutting a longer, a second planarization step is to cross-section flattened by the rough base material cutting step of the arc-shaped in a rolling device, the secure the base to the plate at one side to form a coarse base material and the same surface a second planarization step and a step of fixing, when a plurality of machined holes which are spaced apart from one side of the base material by a distance toward a predetermined side to the other to form the upper surface of a base material machined with a punching tool in a direction and being spaced at set intervals based on the front and rear ends of the base material punched hole and it shifted to each other to form, and the punching step for cutting the both ends of the base material by a predetermined length, burrs an error range based on the end surface of the base material of the base material lower surface rough punching step of removing processed within 0 mm to 0.2 mm and a deburring step, and the third planarization step of planarizing by a tough base material the deburring step the rolling device, the third washing to remove impurities to a rough base leveling step using any one of washing water or air, and washed heat transfer tube support structure of a nuclear steam generator comprising a packing step for packing for shipment to the rough base material a step to the preparation method.

BACKGROUND OF THE INVENTION Field of the Invention

The present invention relates to manufacturing method for heat transfer pipe support structure of nuclear steam generator, and more specifically, by using a punching tool are spaced apart by a distance predetermined by calculating the elongation which occurs according to the processing on the front and rear ends of the base material, the hole formed by the heat transfer tubes relates to a support manufacturing method for heat transfer pipe support structure of nuclear steam generator to minimize the machining error.

Brief Discussion of the Related Art

In general, the steam generator is a plant of the steam supply system of a nuclear power plant. It produces steam to drive a turbine and generator, and serves to remove the heat through the thermal energy generated in the reactor.

In addition, the reactor inside is provided with a control rod and a fuel assembly and it is able to enter into a support structure formed film with large to support the control rod is installed in a vertical direction so that cross each other by configuring the support structure of a fine lattice-like positions the control rods in a vertical direction.

However, the supporting structure of a conventional grid structure; in forming a plurality of grooves on the support structure for configuring a lattice structure, the increasing length than the design dimension by deformation of the base material caused by the punching process or strain is a problem. In addition, when using the support structure are caused by the elongation strain of the base assembly of the grid structure, there are problems that do not form the same space by a modified structure of the base material in the lattice formation.

SUMMARY OF THE INVENTION Problem to be Solved

In the punching operation of the support structure constituting a grid structure, by spaced apart by a distance set in consideration of the deformation of the base material group by processing the hole to minimize the deformation of the base material. It has the objective to generate manufacturing method for heat transfer pipe support structure of nuclear steam generator.

In addition, there is a further object to provide a method for producing the structure. The plate fixed to the punching machine, holes heat transfer tube support of a nuclear steam generator that can be machined to the hole at the correct position using a special self-adhesive tape with a capacity of elongation of the base material to be processed the fastening method of the base material to be processed.

What this invention is trying to solve is not limited in the above are the problems. Problem which the present inventions that are not mentioned here to solve are apparent to those of ordinary skill in the art from the following description as it will be understood.

Solution to the Problem

The manufacturing method for heat transfer pipe support structure of nuclear steam generator is, a roll of base metal roll in the pool while the rolling device on by flattening the first planarization step, a first planarization step over the base of rectangular shape with a predetermined length and a cutting step of cutting a longer, and the second end face is flattened by the flattening step of the rough base material cutting step of the arc-shaped in the rolling device, the second and the fixing step for fixing the base material for the flattening step the plate at one side to form a coarse base material and the same surface, a plurality of machining holes formed spaced apart from one side of the base material by a distance toward a predetermined side to the other in a direction when the upper surface of the base material processing using a punching tool to form shifted each other machining holes spaced at set intervals based on the front and rear ends of the base punch and the punching step of cutting the length pre-set for both ends of the base material, a rough base material at the bottom of punching step burr of the surface relative to the end surface of the base material and the margin of error deburring step for removing processed within 0 mm to 0.2 mm, and the third planarization step of planarizing by a deburring the rough base material the steps in the rolling device, the third cleaning to remove impurities for the flattening step the rough base material using any one of washing water or air, and the rough base material cleaning step Package includes a step of packaging to shipment.

Fixing step can be characterized with the self-adhesive tape and a capacity of elongation of the base generated in the above step by punching when the above adhesive base material and the upper surface or plate securing.

Interval between the machining hole is formed in the punching step can be characterized with punching to reduce by a distance toward a predetermined gap between the machining hole, to calculate the elongation of the base material caused by the punching operation of the punching tool, the other side in the one side.

At the punching step, full-length preform length to the other side in the one side cutting length is set as a group. The group is the final machining error range which is set based on the length of the other side to one side of the base material processing within 1.2 mm and 0 mm.

A third step to planarize rough machining characterized in within the flatness is +1.5 mm to 1.5 mm of the base material.

Effect of the Invention

Nuclear steam generator pipe support structure of this invention, given the local variations and manufacturing methods, punching in the work of a grid structure that make up the support structure. Tear process the hall, always remain positioned between the configured a gap which can minimize local variations.

In addition, there is an effect capable of processing a hole at the correct position using a special self-adhesive tape that can hold the plate, the elongation of the hole being machined the fastening method of the base material to be processed is secured to the base metal punching machine.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a flow chart illustrating a method for manufacturing the heat transfer tube support structure of a nuclear power steam generator in accordance with the present invention.

FIG. 2 is a plan view of a base material made of a heat transfer tube support structure manufacturing method of a nuclear power steam generator in accordance with the present invention.

FIG. 3 is a plan view showing a fixing step of heat transfer tube support structure of the nuclear steam generator manufacturing process according to the invention.

FIG. 4 is a side sectional view showing a deburring step of the method for manufacturing the heat transfer tube support structure of a nuclear power steam generator in accordance with the present invention.

FIG. 5 is a plan view of the lattice structure made of a heat transfer tube support structure manufacturing method of a nuclear power steam generator in accordance with the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Problem to solve for the present invention as described above, the specific details, including the solution, the effect of the invention of the assignment are included in the embodiments to be described in the following examples and drawings. Advantages and features and methods of accomplishing the same of the present invention referring to an embodiment that is described below in detail in conjunction with the accompanying drawings will be apparent.

With reference to the accompanying drawings, it will be described the present invention in more detail.

First, as shown in FIG. 1, the roll form of the base material (10) to the roll in the pool while the rolling device on by flattening the first planarization step (S10), a first planarization step (S10) for spanning the base material (10) to the cutting step (S20) to hold cut than the length of the base material (10) to be cut by a length predetermined as a rectangular shape, the cross section is flattened by the arc-shaped cutting step (S20) the rough base material (10), the rolling apparatus the fixing step for fixing the base (10) to the plate (20) at one side to form a tough base material (10) and the same surface a second planarization step (S30), a second planarization step (S30) (S40), and the base metal (for a plurality of machining holes 30, which are spaced apart from one side of 10) by increasing the predetermined interval the other side formed when the upper surface of the base material (10) is processed using a punching tool in the direction, and the front and rear ends of the base (10) punching step (S50) of cutting a predetermined length at both ends of each shifted by a predetermined machining hole 30 is formed by punching spaced intervals, and a base material (10) and, punching step (S50) the rough base material (10) deburring step for removing the error range based on the end surface of the member 50 of the base bottom surface (10) by processing within 0 mm to 0.2 mm, and (S60), server by the removal steps third flattening step of flattening by the (S60) the rough base material 10 to the rolling device (S70) and a third planarization step (S70) the rough base material 10 for using any one of washing water or air It is configured to include a packaging step (S80) to packaging for shipment to the washing step (S80), and the cleaning step (S80) the rough base material (10) to remove impurities.

First, the heat transfer tube support structure manufacturing method of the present inventors nuclear steam generators performs a first planarization step (S10). In the first planarization step (10) by unscrewing the base material 10 of the roll form a planarization step is performed (S10) by a rolling device. Before the cutting step (S20) is performed by primarily a flattening operation on the base material (10) reduces the degree of deflection to return to the state by the elastic force of the roll when cutting the base material 10 of the base material (10).

It performs a cutting step (S20). In the cutting step, the processing for cutting into a rectangular shape. That is, the cutting step (S20), the base material of the tee-shaped (10) carries out a processing operation will be described below, by cutting the roll form of the base material 10 is, wearing wear in roll form in a rectangular shape.

In addition, the cutting step (S20), the, the parent material (10) wears longer than the cut length to be the final processing. That is, the cut longer than the length of the base material (10) to be cut as much as a predetermined length in the punching step (S50) will be described below. Which, in the punching step (S50), are desirable and designed as cutting length, it becomes longer than the designed cutting length.

After the cutting step (S20), it performs a second planarization step (S30). The second planarization step (S30) performs the task of flattening it, by the rough base material (10), the cutting step (S20) in the rolling device. That is, when the cut the roll form of the base material (10), as in an arc-shaped cross section of the first flattening step the base material of span, even if cutting the 10 (10), the base material over the cutting step (S20) (10) was drawn to a rolling device carries out a flattening operation.

After the second flattening step (S30), the operation performing a setting step (S40). The fixing step (S40), the performing the operation to secure the first base material (10) to a plate 20. One side to form the same plane and two planarization step (S30) the rough base material (10). That is, the base material (10), the plate which forms the same plane with the second planarization step (S30) is completed preform (10) to form a punching step (S50) by punching processing in the machining hole 30 to be described below (20) it is secured using an adhesive tape (40) on one side. This is because the base material to the base material 10 of the possible plates (20) fastened to the jig of the punching equipment fails to enter into the base material 10 to the jig of the punching device as the front end and respectively form the machining hole 30 in the rear end side (10) it is fixed.

In addition, the adhesive tape (40) has a base material (10) and the plate (20), the base material (10) by the adhesive on the upper surface or when the plate (20) to secure the base (10) and the plate (20) in the fixing step (S40) is fixed to one side.

Then, the adhesive tape (40) for fixing the base (10) to the plate (20), is manufactured to accommodate the elongation of the base material (10) to be caused by the punching process in the punching step (S50) will be described below. This base material (10) is punched step (S50) in to prevent the base material (10) is separated from the plate (20) by the deformation which occurs during the punching process, precise processing is possible by enabling punched in the correct position. The role is, the adhesive tape (40), made to stretch to accommodate variations in accordance with the machining of the base material (10), even if deformation occurs in accordance with the machining of the base material (10), without losing the adhesive strength base metal (it serves to secure the to 10) to a side plate (20).

After setting step (S40), it carries out a punching step (S50). In the punching step (S50), is to be spaced apart from one side of the base material (10) by a predetermined distance toward the other side to the operation of processing a plurality of machining holes (30). That is, a punching step (S50), the, after fastening the plate (20) to the jig of the punching device using a punching tool (not shown) of a punching device to space from the upper surface of the base material (10) by a distance predetermined by the lower side direction and processing the processing hole (30). Further, in the punching step (S50), and spaced at set intervals based on the front and rear ends punching machining holes (30), machining holes (30) to be drilled on the front and rear ends of the base material (10), to form shifted by one another. This process is completed by crossing the base material (10) to each other and punching a hole machined in the front and rear ends (30) to create a lattice structure so as to alternate with each other.

In addition, the interval between the machining hole (30) is formed in the punching step (S50) is decreased to be punched at one side by a gap interval that is set toward the other side group. That is, the interval between the machining holes (30), to calculate the elongation of the base material (10) to be caused by the punching operation of the punching tools (not shown) to reduce the distance from the one side toward the other side. This maintains the same spacing and there is a problem that does not form the time when the punching operation, the higher the strain of the base material (10) by the process have configured the base material (10) in a grid structure, the correct lattice structure. Accordingly, in the punching step (S50), it is punched to the position of the punching tool (not shown) so as to gradually reduce toward the gap side to the other at one side of the base material (10) to minimize strain of the base material (10). In addition, the distance between the punching tools (not shown), machining holes (30), which is processed by the, by setting a different distance between the base material (10) is machined hole (30) to be processed in accordance with the full-length length to the other side at one side for punching operation.

In further, in the punching step (S50), it includes the step of reworking the plate (20). By using a punching tool (not shown) on when the processing the processing hole (30) in the front and rear ends of the base material (10), the plate in contact with the base material (10, 20) once the punching tools (not shown) some are processed by. In this case, once the punching tool plate (20) is processed, the plate (20) is deformed, or the end face of the plate (20) is able to maintain a straight surface. That is, the even repetitive processing hole (30) when the deformation of the plate (20) by the processing occurs, the plate (20) once performs the rework step for cutting the surface once the flat of the straight line to face the plate (20) again.

At this time, the plate (20) a at the time of reworking, even if based on the straight side than 2 mm or +2 mm margin of error occurs, the plate (20) for reprocessing and, by processing, a random manner for each processing, a predetermined number of times by the strain using the method of any one of processing and reprocessing the plate (20).

In using the punching step (S50), a punching tool (not shown) is cut by a predetermined length at both ends of the base material (10), after processing the processing hole (30). This serves to minimize the deformation error of the full-length length designed base material (10). That is, the base material to the other side in the one side cutting length is set based on the both ends in the punching step (S50) (10) full-length length, final machining margin of error based on the predetermined length to the other side in the one side of the base material (10) by machining to within +1.2 mm and 0 mm to enable precision machining.

In more detail, the punching step (S50); using the base material (10) is subjected to the sampling processing and performs the task of minimizing the error of the base material (10). That is, in the sampling process, by using a punching tool (not shown) processing hole (30) by spaced set of the design on the base material (10) group intervals. The base material (10), the design when on the group are spaced apart by a set distance in processing the processing hole (30), the base material (10), an elongation in by machining hole (30) is the length compared to the base material (10), the length of the design after the machining of the It is to increase the error is generated.

At this time, the number of the machining hole (30) is processed in an increased length by the machining of the machining hole (30) is the base material (10) was measured, and machining holes (30), the error caused in by the processing of the base material (10) dividing the processing accuracy to readjust each perforated interval processing hole (30) to minimize the error of the base material (10) is performed by a high-punching step (S50).

Further, generated in the above-described sampling process error, the base material (10), the length, the above-described sampling prior to performing the punching step (S50), as occur differently depending on the material of the temperature, the base material (10) of the work area of the processing by the processing hole (30) performs a punching step (S50) so as to improve the machining accuracy to readjust each perforated interval.

In addition, the punching tool (not shown), made of titanium in order to increase the strength, and using a special heat treatment the coated punching tools (not shown).

After the punching step (S50), the operation performing a deburring step (S60). Burr removing step (S60) is carried out the operation for removing the burrs (50) in the punching step (S50) the rough base material (10) at the bottom side. That is, the deburring step (S60), automatically or manually polish the punching tools (not shown) member (50), which occurs when it comes to processing the processing hole (30) in a direction when the upper surface of the base material (10) by using the It performs the task of removing from the work. Which, when removing the burrs (50), which forms a sharp edge cross-section in the deburring step (S60) intersecting the base (10) with each other fastened to the grid structure when concluded to prevent damage to the base material (10) to be entered into the cross each other.

In the deburring step (S60), and processed within a processing error range 0 mm 0.2 mm relative to the end surface of the base material (10). This is member (50) relative to the end surface of the base material (10) is to prevent not protrude outward to prevent damage to the base material (10), which is generated by the server (50).

Member after the removing step (S60), the operation performs a third planarization step (S70). Third, the planarization step (S70), by processing a deburring step (S60) the rough base material (10) with a flat surface once again by a rolling device to thereby increases the processing accuracy. Which, by processing the variations of the final machined base material (10), it serves to enhance the processing accuracy of the base material (10).

Further, in the third planarization, the step (S70), the third processing the flatness to within +1.5 mm to 1.5 mm in the planarization step (S70) the rough base material (10).

After the third planarization step (S70), and proceeds to the washing step (S80), the washing step (S80) is to perform the operation for removing foreign matter using any of the wash water or air to rough the base material (10), a third planarization step (S70).

After the washing step (S80), it performs a packaging step (S80). Packaging step (S80) is wrapped with the washing step (S80) the rough base material (10) to match a standard shipping mechanism.

Thus, the technical construction of the present invention described above will be appreciated that can be embodied without changing the technical spirit or essential features of the other specific forms by those skilled in the art invention.

Therefore, the embodiment described above will appear by the following claims should not be limited to understand within illustrative areas in all respects. The scope of the invention is to be described later, rather than the detailed description, the meaning and range and that an equivalent of the claims and all such modifications that are derived from the type concept should be construed as being included in the scope of the invention.

REFERENCE NUMBERS

-   -   S10: The first Flattening Step     -   S20: Cutting Steps     -   S30: The Second Flattening Step     -   S40: Stationary Phase     -   S50: Punching Step     -   S60: Deburring Step     -   S70: The Third Step Planarization     -   S80: The Third Step     -   S90: The Packing Stage     -   10: Base     -   20: Plate     -   30: Hole machining     -   40: Adhesive Tape     -   50: Burr 

1. First planarization step by unscrewing the base material in roll form of the roll which flattened by the rolling apparatus; the first planarization step over cutting a predetermined length longer than the base material in a rectangular shape; the second flattening step of flattening the end surface by a rough base material for the cutting step of the arc-shaped in a rolling device; the above fixing step for fixing the base plate on one side of which forms the base material and subjected to the same surface flattening step 2; the above are spaced apart from the plurality of processed holes formed spaced apart by a distance toward a predetermined side to the other at one side of the base material by a distance wherein when the upper surface of a base material machined with a punching tool in the direction, and set up in the front and rear ends of the base material punching the processing is shifted to each other to form a hole, and the punching step of cutting a predetermined length at both ends of the base material; deburring step for removing burrs of the rough preform by processing a bottom surface of the punching step within the error range 0 mm to 0.2 mm relative to the end surface of the base material; a third planarization step to planarize the base material by the rough rolling step in the deburring device; wash step to remove impurities by using any one of washing water or air the rough base of the third planarizing step; and packaging step of packaging to ship the rough base the washing step; including the manufacture nuclear steam generator tube support structure comprises.
 2. According to claim 1, the above fixing step, in the above punching step, fixed by adhesive on a lower surface of the base metal plate and the upper surface or the self-adhesive tape with a capacity of elongation of the base material occurring, from one side being cut to a predetermined length at both ends, to the base length of the length to the other is, heat transfer tube support structure method of a nuclear steam generator, characterized in that the processing within the group based on the final machining error range of the set length from one side to the other side of the base material to a +1.2 mm 0 mm.
 3. According to claim 1, interval between the machining holes formed by the punching step is, heat transfer tube support structure manufacturing method of the nuclear steam generator wherein the punched by calculating the elongation of the base material caused by the punching operation of the punching tool, so as to shrink the other side in the one side as much as ever interval preset the distance between the processing hole.
 4. Within the claim 1, the above third step, the planarization is, the above third manufacturing method for heat transfer tube support structure of a nuclear steam generator for a planarization step is wherein the rough machining within +1.5 mm to 1.5 mm flatness of the base material. 